Spark Ignition Direct Injection, very nice indeed how it works, a big step up for the HFV6 motor, from 195kw to 215kw, 3.6L, and a new motor 3.0L, I dont know who made it first but Holden have been using it already in their Z22SE motor for a few years, the Z22SE motor has minor problems with the high pressure motor and no doubt the VE motor will aswell... the SIDI isnt 'VE series 2', i dont think there will be a series 2, but this motor is going in the 'VF' commodore next year.. Just because i work at holden doesnt mean im going to stick up for them lol i have no clue who 'made' SIDI, its been out for ages. at holden collage they say we are the first in the country or something like that....